ConvertGUI

GUI video converter/trimmer powered by Go, Wails v2 (WebView2), and FFmpeg.

Features

• Video preview with HTTP byte-range seeking + automatic MP4 proxy fallback (MKV/AVI/HEVC)
• Interactive dual-handle timeline trim (-ss, -to), filmstrip thumbnails, loop-selection preview, I/O hotkeys
• Optional spatial crop overlay (crop=w:h:x:y, even-dimension clamped)
• Multi-audio stream handling (amix=inputs=N:normalize=0, single-track selection, or -an mute)
• Speed multiplier (0.25x–8x) with setpts + chained atempo
• Codecs: libx264, h264_nvenc, libx265, hevc_nvenc; HW decode (none, nvdec, d3d11va, auto); CRF/CQ, preset, tune, FPS
• Windows Explorer context menu (-i "%1"), drag-and-drop, NSIS installer

Dev / Build

cd frontend && npm install && npm run build
cd .. && go test ./...
$env:CGO_ENABLED="0"; $env:GOOS="windows"; $env:GOARCH="amd64"
go build -tags desktop,production -ldflags="-H windowsgui -s -w" -o dist/convert.exe .

CI

• Workflow: .gitea/workflows/build.yaml (ubuntu-latest)
• Builds ConvertGUI-Setup-<version>.exe (NSIS + bundled static ffmpeg.exe/ffprobe.exe) and ConvertGUI-Portable-<version>-win64.zip
• Publishes release assets on v* tags via akkuman/gitea-release-action@v1